Open Access

Decreased LIPF expression is correlated with DGKA and predicts poor outcome of gastric cancer

  • Authors:
    • Yi Kong
    • Yan Zheng
    • Yanfei Jia
    • Ping Li
    • Yunshan Wang
  • View Affiliations

  • Published online on: August 1, 2016     https://doi.org/10.3892/or.2016.4989
  • Pages: 1852-1860
  • Copyright: © Kong et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Gastric cancer (GC) is a common and deadly digestive tract tumor worldwide. Unfortunately, diagnosis of GC is usually confused and misleading because of atypical symptoms or incomplete complaints. Accordingly, exploring gene expression profile and identifying genes with analogical variance trend will bring new perspective into the diagnosis and treatment of GC. Herein, a RNA‑Seq dataset from Caucasian GC and their matched non‑cancerous samples [Gene Expression Omnibus (GEO): SRP049809] and datasets from four microarrays constituted with tumor and non‑tumor tissues (GEO: GSE13911, GSE19826, GSE29272, GSE33335) were analyzed to explore the differentially expressed genes (DGEs). As a result, we identified a core set of 373 DGEs. Among these genes, we found that most downregulated genes were related to lipid‑metabolic functions. Especially, the gastric lipase (LIPF) gene, which was connected with various lipid metabolism processes, was significantly decreased among all datasets. We then performed immunohistochemistry experiments using gastric tissue arrays to investigate the clinical effects, and the expression of a LIPF target gene, diacylglycerol kinase α (DGKA). Among the 90 samples of gastric adenocarcinoma, the LIPF and DGKA levels were both decreased in cancer tissues [LIPF, 59.1% (53/90); DGKA, 77.8% (70/90)] compared to normal tissues [LIPF, 94.4% (85/90); DGKA, 90% (81/90)]. The expression level of these two proteins in GC was associated with local invasion and disease stage. Cox regression identified high DGKA expression (HR, 0.49; 95% CI, 0.26‑0.94; P=0.03) as a predictor of good prognosis and LNM status (HR, 4.63; 95% CI, 1.39‑15.51; P=0.01) as a predictor of poor prognosis. Thus we speculated that LIPF‑DGKA might serve as a potential possible biomarkers for diagnosis of GC, and their downregulation may bring new perspective into the investigation of GC prognosis.
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October-2016
Volume 36 Issue 4

Print ISSN: 1021-335X
Online ISSN:1791-2431

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Copy and paste a formatted citation
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Spandidos Publications style
Kong Y, Zheng Y, Jia Y, Li P and Wang Y: Decreased LIPF expression is correlated with DGKA and predicts poor outcome of gastric cancer. Oncol Rep 36: 1852-1860, 2016.
APA
Kong, Y., Zheng, Y., Jia, Y., Li, P., & Wang, Y. (2016). Decreased LIPF expression is correlated with DGKA and predicts poor outcome of gastric cancer. Oncology Reports, 36, 1852-1860. https://doi.org/10.3892/or.2016.4989
MLA
Kong, Y., Zheng, Y., Jia, Y., Li, P., Wang, Y."Decreased LIPF expression is correlated with DGKA and predicts poor outcome of gastric cancer". Oncology Reports 36.4 (2016): 1852-1860.
Chicago
Kong, Y., Zheng, Y., Jia, Y., Li, P., Wang, Y."Decreased LIPF expression is correlated with DGKA and predicts poor outcome of gastric cancer". Oncology Reports 36, no. 4 (2016): 1852-1860. https://doi.org/10.3892/or.2016.4989